/** dac management front-end*/

#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#include "phal_hw_api.h"
#include "hwapi_backd.h"
#include "dac_api.h"


int semid,semidx;

struct dac_interface *my_dac;

int tstampcnt=0;

void syncTslot ();

/** this function is called every dac interrupt. it encompasses the system time slot
 * and synchronizes local time reference.
 */
void syncTslot ()
{
  post_sem_n(semid,semidx);
  time_t time;
  tstamp_to_time(tstampcnt++,&time);
  set_time(&time);
}

int configure_dac (struct dac_cfg *dac, int sid, int sidx)
{
	int n;
	int freq;
	semid=sid;
	semidx=sidx;

	my_dac=dac->ptr;
	
	if ((n=my_dac->readcfg(dac->filename,&dac->NsamplesIn,&dac->NsamplesOut))<0) {
	  printf("Error reading dac config. Errno=%d\n",n);
	  return 0;
        }	
	if ((n=my_dac->init(&dac->ts_len,dac->dacinbuff,dac->dacoutbuff,syncTslot))<0) {
		printf("Error configuring dac. Errno=%d\n",n);
		return 0;
	}
	return 1;
}

void close_dac()
{
	my_dac->close();
}